Qingde Wen

Weidong Feng^*,1,2, 

Yan Qian^*,1, 

Qingde Wen², 

Weigang Dai^1,2, 

Shirong Cai¹ 

¹Division of Gastrointestinal Surgery Center, The First Affiliated Hospital, Sun Yat-Sen University, 

²Center of Endoscopy, The First Affiliated Hospital, Sun Yat-Sen University